Added flake8 F401 ignore rule for __init__.py files

[UmairK5669]

Description:
Added flake8 F401 ignore rule for init.py files

Checklist:
Please be sure to check all boxes honestly. This is to ensure a smooth development process, and to reduce the
likelihood of needing to make additional changes later on.

• I understand that changes authored by individuals who have not signed a Contributor License Agreement (CLA),
  or whose authorship we cannot verify, may not be accepted.
• These contribution address a triaged issue.
• I have performed a self-review of my code and my changes generate no new warnings.
• I have included unit tests for my code contributions, and all tests are passing.
• The docstrings are complete, include doctests demonstrating usage, and are properly formatted.
  I have verified that any updates to the project documentation are complete and look okay.
• I have confirmed all my code contributions are formatted in accordance with the project's Flake8, Black,
  and isort style configurations.
• No unnecessary changes have been made to the Poetry lock file, but pyproject.toml and the Poetry lock file
  have been updated to reflect any dependency changes.
• I acknowledge that upon the submission of this pull request, Qoherent will assume the copyright for this
  contribution.

[mrl280]

Looks good, thanks for sorting